Lis Deepasthambham Project — cheating

I have deposited a sum of rs. 100000.00 (Rs. One lakh only) on 13th june 2005 and rs. 300000.00 (Three lakhs only) on 30th november 2005 as membership fee of their lis - deepasthambham project. They offered that they would returned back a double amount within a period of one year. But still now they didn't give any amount. Please take action against them and help me to get this amount in my helpless condition.